<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        *{
            margin: 0;
            padding: 0;
        }
        li{
            float: left;
            list-style: none;
            height: 100px;
            width: 100px;
            line-height: 100px;
            text-align: center;
            font-size: 25px;
            font-weight: bold;
            border: 1px solid #cccccc;
            cursor: pointer;
        }
        #Box{
            position: relative;
            left: 50%;
            margin-left: -200px;
            top: 200px;
            width: 408px;
            height: auto;
            border: 1px solid #cccccc;
            border-radius: 10px;
            overflow: hidden;
        }
        .show{
            position: relative;
            height: 120px;
            background-color: rgb(153,152,154);
        }
        span{
            display: block;
            height: 50%;
            padding-right: 10px;
            line-height: 60px;
            direction: rtl;
            font-size: 35px;
            color: white;
        }
        .clear,.zeo{
            width: 202px;
        }
        .calculation{
            background-color: rgb(255,158,27);
            color: white;
        }
    </style>
</head>
<!--

    eval
-->
<body>
    <div id="Box">
        <div class="show">
            <span>0</span>
            <span>0</span>
        </div>
        <li class="clear">C</li>
        <li class="percentage">%</li>
        <li class="result">=</li>
        <li class="calculation">÷</li>
        <li class="number">7</li>
        <li class="number">8</li>
        <li class="number">9</li>
        <li class="calculation">x</li>
        <li class="number">4</li>
        <li class="number">5</li>
        <li class="number">6</li>
        <li class="calculation">-</li>
        <li class="number">1</li>
        <li class="number">2</li>
        <li class="number">3</li>
        <li class="calculation">+</li>
        <li class="number zeo">0</li>
        <li class="decimal">.</li>
    </div>

    <script>

    </script>

</body>
</html>